# Volume Units Converter vs Matrix Calc Plus

The clearest difference is price: Volume Units Converter at $1.99 against Matrix Calc Plus's $2.99. Volume Units Converter also leads on iOS requirement (15.0 vs 18.2). On update cadence, ads, in-app purchases and device support there is nothing between them.

Volume Units Converter costs $1.99 and Matrix Calc Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Volume Units Converter ships an update every 32 months, Matrix Calc Plus every 26 months. The most recent releases landed on September 25, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | Volume Units Converter | Matrix Calc Plus |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/volume-units-converter/id1443940327/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 26 months** |
| Monetization | Paid | — |
| Size | 1 MB | 9 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kei Suefuji](https://appshunter.io/developer/1388335881) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### Volume Units Converter

[App page](https://appshunter.io/ios/app/volume-units-converter/id1443940327)

Easily convert volume measurements between 18 different units. Simply input your value and select the desired units for instant conversion. Supports a wide range of common and specialized volume measurements.

**Highlights:** Converts between 18 volume units, Supports cubic meters, liters, gallons, and more, Intuitive input and unit selection, Displays converted values instantly, Covers UK and US liquid/dry measurements

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Matrix Calc Plus

[App page](https://appshunter.io/ios/app/matrix-calc-plus/id1592961256)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Volume Units Converter free?

Volume Units Converter costs $1.99, with no in-app purchases.

### Is Matrix Calc Plus free?

Matrix Calc Plus costs $2.99, with no in-app purchases.

### Do Volume Units Converter or Matrix Calc Plus have ads?

Neither Volume Units Converter nor Matrix Calc Plus shows ads.

### Which is updated more often, Volume Units Converter or Matrix Calc Plus?

Volume Units Converter ships an update every 32 months, and Matrix Calc Plus every 26 months. Most recently, Volume Units Converter was updated on September 25, 2026 and Matrix Calc Plus on June 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*